forked from Minki/linux
a325725633
We already have a fallback in place to fill out the unique from dev->unique, which is set to something reasonable in drm_dev_alloc. Which means we only need to have a special set_busid for pci devices, to be able to care the backwards compat code for drm 1.1 around, which libdrm still needs. While developing and testing this patch things blew up in really interesting ways, and the code is rather confusing in naming things between the kernel code, ioctl #defines and libdrm. For the next brave dragon slayer, document all this madness properly in the userspace interface section of gpu.tmpl. v2: Make drm_dev_set_unique static and update kerneldoc. v3: Entire rewrite, plus document what's going on for posterity in the gpu docbook uapi section. v4: Drop accidental amdgpu hunk (Emil). v5: Drop accidental omapdrm vblank counter change (Emil). v6: Rebase on top of the sphinx conversion. Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Cc: Emil Velikov <emil.l.velikov@gmail.com> Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (virt_gpu) Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/pci.h>
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#include "virtgpu_drv.h"
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static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
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{
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struct apertures_struct *ap;
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bool primary;
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ap = alloc_apertures(1);
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if (!ap)
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return;
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ap->ranges[0].base = pci_resource_start(pci_dev, 0);
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ap->ranges[0].size = pci_resource_len(pci_dev, 0);
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primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
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& IORESOURCE_ROM_SHADOW;
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remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
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kfree(ap);
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}
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int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
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{
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struct drm_device *dev;
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int ret;
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dev = drm_dev_alloc(driver, &vdev->dev);
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if (!dev)
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return -ENOMEM;
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dev->virtdev = vdev;
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vdev->priv = dev;
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if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
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struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
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bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
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DRM_INFO("pci: %s detected\n",
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vga ? "virtio-vga" : "virtio-gpu-pci");
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dev->pdev = pdev;
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if (vga)
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virtio_pci_kick_out_firmware_fb(pdev);
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}
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ret = drm_dev_register(dev, 0);
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if (ret)
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goto err_free;
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
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driver->major, driver->minor, driver->patchlevel,
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driver->date, dev->primary->index);
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return 0;
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err_free:
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drm_dev_unref(dev);
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return ret;
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}
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